Regarding the Saturn V, CAN it be done: YES. There is a man here in Reading, PA building a P-61 from scraps of a crashed plane, new materials and some microfiche plans from North American. It is supposed to fly this year or next and certainly appears likely to happen. The effort has become a life mission for him. These things CAN be done.
WOULD the US Government build another Saturn V and go to the moon, or any other planet/asteroid for that matter? No. They are far too interested in tracking our email and phone calls and other things that I would not recommend we get into here.